安哥拉南部广泛发育花岗岩残积土,研究强夯法对花岗岩残积土地基处理效果对该区工程建设具有重要意义.依托安哥拉RED社会住房项目,通过钻探取样、室内试验、强夯试验、动力触探和荷载试验揭示了安哥拉花岗岩残积土的工程特性,分析了强夯法对安哥拉花岗岩残积土的处理效果.结果表明:安哥拉花岗岩残积土可定名为砂质黏土,具有湿陷和软化的工程特性,承载力软化系数为0.38,变形模量软化系数为0.31.强夯法可有效消除一定深度花岗岩残积土的湿陷性、提高花岗岩残积土的干密度、显著提高花岗岩残积土的地基承载力和变形模量,处理深度和提高系数与最后两击夯沉量和点夯间距有关,但强夯后花岗岩残积土仍具有软化性.

低影响开发(LID)作为一种新兴雨洪管理技术,在削减城市雨水径流和污染物浓度等方面效果显著,近些年在海绵城市建设中得到广泛应用.文中主要综述了几类典型LID设施(生物滞留池、下沉式绿地、植草沟、屋顶花园和透水路面)及其主要功能;概述了其对暴雨径流和主要污染物的削减效果,并对典型LID的作用机理进行了分析和总结;总结了几种常用雨洪控制模型在LID中的使用现状;研究了LID设施综合效益评估现状;并分别在技术、模型、效益评估方面提出建议.文章旨在通过总结目前国内海绵城市LID技术使用现状,为LID未来广泛实践提供一定的指导和建议.

[目的]识别兆河流域非点源污染分布特征及其关键源区,为流域污染控制和清洁小流域建设提供科学参考.[方法]通过建立流域非点源污染控制模型,模拟研究该流域在现状年和规划年的非点源污染分布特征.采用单元负荷指数法识别流域的关键污染源区,预测不同非点源污染控制措施对流域污染负荷量的削减效果.[结果]兆河流域规划年的氮磷负荷量比现状年分别增加45.3％和8.0％;县河、失曹河、裴河、盛桥河及环圩河子流域为流域非点源污染关键区;通过设置合理的工程措施和耕种管理措施可有效控制流域非点源污染.[结论]合适的非点源管控措施有助于削减流域氮磷污染负荷量.耕种管理措施加工程措施为最佳管理措施,可以有效控制流域总氮和总磷的非点源污染.

A comparison of differences of total bacteria,ammonia oxidizing archaea (AOA) and ammonia oxidizing bacteria (AOB) communities between water,sediment and riparian soil sampled in Weihe River catchment is made based on the terminal restriction fragment length polymorphism (T-RFLP) technique.The species abundance and Shannon index of microbial communities in soil are higher than the result of water and sediment.Soil and water share more T-RFs and have higher similarity in community structure than sediment and water.Either AOA or AOB community similarity between different samples is higher than that of total bacterial communities.Compositions of dominant bacterial species in water,sediment and soil are quite different,while both AOA and AOB dominant species in different samples are relatively more similar.The results show that riparian soil seems a major source of microorganism in Weihe River,with positive effect on the stability of AOA or AOB communities and the diversity of total bacteria in the river.

The Real Estate Development projects in southern Angola have many characteristics , such as large span of plane space and longitudinal altitude ,great difference and complicated variable in climate ,topography ,geomorphology , and geological conditions .The important issue of thes projects at the designing stage is to optimize the design plan by tak-ing advantage of the present topography ,local materials and constructive techniques ,in order to reduce the construction expense and difficulty ,shorten construction period ,as well as promote project implementation .Based on the analysis and research of the design optimization of these projects ,the principles and methods suitable for overseas EPC general con-tract projects were put forward ,and the design optimization experience were summarized .This study can provide some references for the design of other overseas EPC general contract projects .

In different planting density, researching the removal effect of the polluted water by Typha orientalis .The results showed that planting density and the treatment effect is proportional .When the density of Typha orientalis is 27 strains per square meter, purification effect is best, and the removal rate of ammonia nitrogen, TP, TN were 94.81%, 77.42%and 82.84%.